Rail-bond



-INTON. RAIL BOND (No Model.)

: No'. 601,707. PatentedApr. 5 1898.

A i n m m. M. d n L V 'taet of large forming these operations.

" view of one the following is a bond to be same will be more readily understood from being shown in. axial section.

UNITED ST T S PATENT 'rr'rcn.

JOHN J: DAlNTON, OF CHICAGO, ILLINOIS.

RAIL-BOND.

srucrrrcArroiv forming part of Letters Patent No. 601,707,- dated April 5, 1898;

terminals to be secured'withinthe webs of the rails at each end of said fish-plate.

A designates the conductor or body of the bond. Preferably and as herein shown said body is made of drawn copper as to insure the maximum conductivity with a given cross-section of metal; be understood that the form of the body is not essential, and it may be made of cast-metal, if desired. In order to provide for endwise movement'of the rails with relation to each other under contraction and expansion and To all whom'it may concern:

Be it known that 1, JOHN J. DAINTON, of Chicago, in the county of Cook and State of Illinois, have invented certain-new and useful Improvements in Rail-Bonds, of which specification.

This invention relates to improvementsin electrical connectors commonly designated rail-bonds, andrefers more particularly to improvements in rail-bonds of that class provided with tubular terminals which are inserted and secured within suitable apertures formed in the web or body'of the rails.

he particular object of the present invention is to provide a bond which is so constructed as to insure a very perfect electrical conarea between the rails and terminals, so as'to reduce resistance to a minimum, and is at the same time capable of being' readily removed from the rails without injury to the bond, thereby enabling the same used over and over again as-the rails are renewed.

' Subordinate advantages resent invention are a saving of time-an and removing the bonds of all special tools for perersing cars without bringing an undue strain upon the terminals, the body of the'bond is shown as provided with a bend or loop of any suitable form, as indicated at a, in the usual manner.

'vided with a tubular terminaLA, said terminals being arranged to stand with their axes at right angles to the main and parallel with each other. The terminals achieved by the are of approximately cylindric form and of d somewhat greater length than the thickness of the part of the rail within'which they'are designed to be inserted, so that when the bond is in place a space will be left between the body of the latter and the'side of the rail labor in applying and the dispensing The .invention consists in the matters hereinafter described, and more particularly.

pointed out in the appended claims, and end portions of the terminals which extend through the rails are made slightly tapering the following description, reference being had to the accompanying drawingsfiri which- Figure 1 is a general plan view of an approved embodiment of my invention. Fig. 2 is a transverse vertical sectional view of an ordinary street-railway rail plied thereto, the section being taken axially through one of the terminals of the bond. Fig. 3 isa perspective view of one of'the driftpins used for expanding and securing the terminal within the rail. Fig. dis a perspective of the terminals andthe connect-' ed end of the body of the bond, the terminal the thickness of the web what greater than may be driven into the rail to fit therein, notwithstanding slight variations Referring to the drawings, the bond shown therein isone ofthe type commonly known as long bonds e., a bond provided with a body long enou h toextend over the connecting fish-plates of the rails and enable the into more wire or rod,-so

vertical movement under the weight of travx At each end'the body of. the bond is probody of the bond I throughout aportion of their length someof the rail engaged, so that said terminals form a driftin the diameter of the receiving-apertures correspond to the external form tinned vibration imparted thereto by the traversing cars, there is more or less tendency of the terminals-to become loosened in 45 their seats Within the rail after a long period of use. With my improved construction, however, it is only necessary to go over the road occasionally and by driving the driftpins in slightly thus overcome any possible 50 looseness in the terminals and corresponding increased resistance.

I claim as my inventionperfect electrical contact withthe rail, driftbore of the terminal and expand or swage the terminal into forcible contact with the rail. The drift-pins will be driven into the terminals from the same side that the terminals are inserted in the rails, and the firmness with which the terminals are expanded Within the pins will be relied upon solely for retaining I the bond within the rail. The drift-pins are of greater length than the length of the terminals and are so proportioned that when :5 driven home they will project at each end beyond the ends of the terminal, which let ter. will preferably be left approximately In order that the full expansive force'of the drift-pin may be exerted upon that part of the terminal which extends within the body of the rail, the terminals are counter bored or enlarged, throughout the portion which protrudes from the rail, sufi'iciently to permit the'drift-pin to fit loosely therein, as

" indicated clearly in the drawings. With the bond constructed as above described it is applied by first driving the ter- 0 minals firmly within the tapered apertures of the rails and thereafter driving the drift-- pins within the terminals from the same side or in the same direction in which the terminals are driven into the rail. Should it become necessary at. any time to remove the bond from the rail, the drift-pin will first be driven out, after which one or more light taps "of the hammer upon the end of the terminal will start the latter back from the tapered 4o apertureof the rail and without in ury to-or disfiguring the bond. Owing to the contraction and expansion of the rail audible 0611- t soas to'prevent the expansion of the metal under the action of the drift-pin from forming a head or head to interfere with the re moval of the bond.

2. A rail-bond provided with tapered terminal sleeves entering tapered holes in the rail web or flange from the larger side of the hole and removably expanded therein by ta- 7o pered drift-pins inserted from the same side as the rail-bond, said terminals being counterbored throughout the portions thereof external to the rail, and the drift-pins being of greater length than the terminals and ar;,, ranged to project at each end of the latter.

In testimony that I claim the foregoing as my invention I aflixm y signature, in presence of two subscribing witnesses, this 13th day of February, A. D. 1897.

. JOHN J. DAINTON.

Witnesses:

Gno. IE. FINK, l ALBERT HiGnAms. 

